Mechanism for coiling and cutting wire springs.



N. S. HARTER. MECHANISM FOR UOILING AND CUTTING WIRE SPRINGS.

APPLICATION TILED D3013, 1909.

Patented Oct. 1, 1912.

3 SHEETS--BHEET 1.

N. S. HARTBR.

MECHANISM FOR BOILING AND CUTTING WIRE SPRINGS.

APPLICATION II'LED DEO.13, 1909.

1,040,196. Patented 0013.1,1912.

3 SHEETBSEEET 2,

wrmesscs m mvzn'ron N.-S. HARTER.

MECHANISM FOR GOILING A ND CUTTING WIRE SPRINGS.

APPLICATION FILED DEC. 13. 1909. 1,040,19 Patented Oct. 1,1912.

3 SHEETS-SHEET '3;

WITNESSES INVENTOR W I 7"). S. Hwdw.

W @AMMQMMW: 9mm.

I QU A g UNITED STATES PATENT omnoE;-

NOAH s. ,HARTER', or- WAUKEGAN, ILLINOIS, AssiGNoR TO AMERIcAnQsrr EL ANn COMPANY or N W JERSEY, or oBoKEN; NEW JERSEY, ATCQQRPORATION F mEcr AiiIsm Eon. COILING Aim CUTTING wIEE sPRmGs.

Applicatien file d December 18, 1909. Serial No. 532,884.

a my

' Be 'filmown tha I, NOAH S. HARrER, 0

l waukegan, Lakef connty, Illinois, have inriented a newqand ljiseful Mechanism for 5. Coiling andCii-tting Wire Springs, of which.

,the followingizisv a full, clear, and exact'de- 'pscription, reference beinghad to the accompanyingdrawings forming part of this -specification,ain wh chif 0 Figure 1 is a plan view of mechanism embodying my invention; Fig. 2 is a side view of-;the same; Figs. 3 and 4 are detailviews gshowing- ,the'clutch mechanism; Fig.-5 is a i-detail view"ofa portion of the mechanism -fo'r ;releasing the pressure of the feed rollers;

and. Fig. 6 is a detail view onit controlling/switch in some respects an improvement upon the zmechanism described andclaimed in my prior Patent-No.'f8;73,430." i

Anobject of I my? invention is to provide: I improved means, an automatic coiling. 2 5 and cutting machine,- for releasing -the'presj 'sj ure' 'o f. the feed rollers fiom the wire from 'ijwhioh aspring' is being coiled, so'that-the coiling of the spring will be momentarily "-'discontinued at ,the time the cut-is made, "*tlius avoiding mutilation of the spring.

jii'Qfurthei ",object is to provide means of s" plej' and,ic0nveni,ent charactenfor, autori-iitiiiiillf coiling"and cuttingcoil springs,-

"fesililile'arcing'atfthis 'point. objects and advantages or my inhwnebn "-her'einatterappear. j QReferri'figfto- .th'effirawingsgjthe numeral 2 desi'g'nates the resins of afsprin'g coiling ilililzhine, which maybe of any suitable char;

fd'tli for supportihg=tl1e operative parts. h flhenumerals 3and 4 'designate 'twe Specification of Letters Patent.

of r the rotary cir" :My'sinventionghas relation to mechanism fort-coiling andfcnttmgwofl springs, and is .at its endportion as shpwnla I cutting edge within thej-spring B;

Patented Oct. 1, 1912.

of feed-in rollers for the wire A from which the springs (one of which is'indicated at ,B) are to be formed. The lower'rollers. ,4 are relatively fixed rollers, whe may-m positively driven inanyi-man'ner i1f0t1sho;.wn-. The upper rollers 3'are eachfniou-nted on a shaft 5, which is pivotedatonesidefpf the machine frame so as to 'pei mit the shaft to swing upwardly in a vertical plane about the center 6, thus separating the rollers '3 p and 4 ofeach pair suflieientlyjto release the feeding pressure on thewire A Theltwo sets of, rollers are prefierablyi peripherally wires tobe fed. a The rollers '3 arenormally:held in contact with, ,thewire A by meansmf a -.yo k e 1 beating upon the roller which is con nected by a rod 8 with a=be1lfcranklever 9, which, is actuated in the manner hereinafter grooved, as indicated, toiproperly guide {the described.

l0 designates an.arbor around' whiehfi-he spring B is coiled. This arborjgiscl ltaway 12 designates a coiling dim lmdam a cutting tool mounted in: the, reciprocat ng cutter bar 13' connected,:tojaneoperatmg crank 14011 a transverseshaft-l; Loosely which may be driven by belt or other s'uitable means. a i

17 designates a clutch-member,whichcis formed with or rigidly secured to the fly wheel 16 so as to turn constantly therewith.'

.18 is another clutch member,- -w-l ich is'rig idly secured to the-sha-ftIQ1-5 within the clutch member 17, and which has on its periphery a number of depress'io'ns 219- hav-1ngthe.\1n-

to. (form a I dined wan-s ate irollers; W ii ch ("are placed in said depressions, and which are controlled-shy amembi 22 which is loosely mounted on the shaft l5.-'"Th1s mem ..ber 22 has-an inwardly extending slotted wflange 22 j the rollers 21 lying-in the slots :ofsaid'flange.

z 23 i a collar which rigidly secured to the shaft'l5 and which is provided-With-a "iliiinber lofradially projecting arms 24.

C nnected to -these arms at one end "and to the: member 22.at .the other."end,- 'are springs Q5 "The members-22 -alsohas aproye'ct ng @5526; which is vadapted to engage a :stop

30., leading from the battery 46 and forming 27. This stop is mounted onearm of a lever 28, and is preferably provided with a cushioning sp'ring'29.

30 is a tension spring connected at one end to the lever 28 and at the other end to in said figure by-the action of electromagnets 31.

Rigidly secured to the shaft 15 is a disk 32 of fiber or other insulating material. Mounted on this disk.is a metal segment 33 adapted to befengaged by a pair of contact brushes 34 and 35 forming a part of the circuit of the electromagnets 31. 1

36 is a metal disk, which is mounted opposite the end of the coiling mandrel 10 and in the path of the'spring B. :This disk is loosely mounted in a bracket 37 by means of a rod 38, a coil spring. 39 being introduced between the bracket and disk. Secured to the rod 39 is-a disk 40 of fiber or other insulating material.

41 and 42 designate contact springs hav-- ing the contact points 43, and which are connected to opposite sides of the wires 44,

part of the circuit of the magnets 31. The spring 39 is sufficiently stiff to normally hold the disk 40 against the contact spring 43, and thereby hold said contact spring sufficiently away from the contact spring 42 to normally keep the circuit of the electromagnets open between these springs, as shown in. Fig. 1.

47 designates a cam, which is rigidly secured to the shaft- 15, and which is engaged by a roller 48 at the upper end of a lever 49. The lever 49 is pivoted to the frame at 50 and its lower arm is connected by link 51 with the bell crank lever 9 before re ferred to.

The operation is as follows :Assuming that the feed rollers 3 and 4 are being driven and that the wire A is being forced into the coiling mechanism and a coil spring B is being formed, the wheel 16 is turning loosely on the shaft 15 and the clutch is out of action. The shaft 15 is, therefore, stationary. When the spring B has been coiled to the desired length, it comes in contact with the disk 36 and forces said disk outwardly against the resistance of the spring 39, This permits the contact points of the contact springs 42 and 43 to engage each other and close the circuit from the battery 46 through the electromagnets. This in turn moves the stop 27 out of engagement with the nose 26 of the clutch member 22. The springs 25 then act to turn the member 22 sufiiciently to force the rollers 21 up the inclines 20 so as to wedge them between the clutch members 17 and 18. This causcs the shaft-15 to rotate. As this shaft tuinsfi cm its normal ,position, the .cain'47 also turned with it,an d the'ilever 49 drcpso'fi from the high part of said cam and through the connections described releases the pressure of the yoke 7 on the upper jfeed-rolls 3. This causes th coiling of 'the-springito be momentarily"discontinued, without dis continuing the rotating ino'vementof-the' feed rollers. When the cutter shaft-118s made a portion of a revolution, the

tric circuit will, therefore, be broken hctween the contacts 34 and 35. gizes the magnets 31 and-permits the spring. 30 to pull the stop 27 back to its stop osh, tion. Whenthe shaft 15 has made a complete revolution, the clutch member 22 will strike the stop 27, thus stopping the rotating movementof the member 22; and this This de nerin turn moves the rollers from their wedged I positions between the clutch. members 17 and 18 and throws the clutch out of action There is always suflicient momentum in the shaft 15 and the niembers mounted thereon so asato produce a;slight continued moven'ien of said members after the part 22 has come to a stand-still. Therollei's 211will,

therefore, remain loosely between the clutch members 17 and 18 until the stop 27 is again'moved out-of engaging position. The cam 47 willalso have completed one [revolution and stopped in its normal position,- so that the coiling process will 'becontinued until the circuit is again closed at-the contacts 42 and 43. y f e v The position of the s ring-eng'a 'ing-disk or plate 36 can readily e 'adjuste' so as suit any length of spring.

The mechanism described formsa simple.

and practical mechanism by means of wh ch 1 coil springs maybe formedaiid automate cally cut into the desired lengths without mutilation by reason of the'euttingoperation.-

It will may be made in the details a: construct on, arrangement and combination of the-several parts. i may be employed for controlling the mo\ e-. ment of the shaft 15; the electric circuits and their controlling devices may bearranged in various ways, and other changes may be made in the details of the parts.

1. In a helical springcoiling machine-the combination of mechanism for forming a be obvious that various changes Thus, any suitable form of clutch helix having a plurality of coils, cutting mechanism or severing the helix from the uncoiled wire stock, means for actuating the coil forming mechanism and means arranged to momentarily arrest the operation of the coil forming mechanism while the cutting mechanism is being actuated to sever the helices from the wire.

2. In a helical spring coiling machine the combination with mechanism for forming a helix having an plurality of coils and a cutting mechanism to sever the formed helices from the wire, of friction delivery rollers to feed the wire to the coiling mechanism, and means for temporarily releasing,

the pressure of the friction delivery rollers 'on the wire while the cutting mechanism is being actuated to sever the formed helices from the wire.

3. In a helical spring coiling machine the combination with mechanism for forming a helix having a plurality of coils, cutting mechanism for severing the formed helices from the wire stock, and means for actuating the coiling and cutting mechanisms, of a plurality of pairs of feed rollers, one roller of each pair being movable toward and away from its opposing roller, mechani; cally operated pressure means for normally holding said movable rollers in feeding relation to the wire, and mechanism operated said shaft, clutch means for intermittently connecting the member and shaft, and an electromagnct for controlling the clutch mechanism, and a stop located in the path of movement of the helical spring being coiled, said stop having a contact arranged to control the circuit of said magnet and being actuated by pressure of the end of the coil being formed to complete the circuit of said magnet.

5. In a helical spring coiling machine the combination with mechanism for forming a helix having a lurality of coils and means for intermittent y operating said coil form; ing mechanism, of a cutting-off tool, a shaft for actuating said tool, a constantly driven member loosely mounted on said shaft, clutch means, for connecting the member and shaft, an elcctromagnet for controlling the clutch mechanism, a circuit controllin device mounted on said shaft, and a secon circuit controlling device having means actuated by the formed helix for controlling the action of the second circuit controlling device. i I

6. In a helical spring coiling machine the combination with mechanism for forming a helix having a plurality of coils, of a cutting-oil tool, means for actuating said tool, an electromagnet for controlling the operation of the cutting-off tool, a circuit control ling device operated by the movement of theformedhelix for starting the operation of the cutting-oil tool, and means controlled by the operation of the tool actuating means to momentarily stop the feed of wire, and

arrest "the coil forming operation while the 'cutting tool is operated.

In testimony whereof, I have hereunto set my hand.

- NOAH S. HARTER. lVitnesses E. E. Boorrmnxn, HARLOW M. Comics; 

